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在垃圾填埋场对隔离墙和透反应障碍物的性能研究:多规模实验和数值分析

Yang Chen¹, Haijian Xie², Yanghui Shi¹

¹College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China.

Waste management (New York, N.Y.)

|May 3, 2025

概括

碳氧甲基纤维素 (CMC) 修饰的土岩垂直屏障和透反应屏障 (PRB) 为垃圾填埋污染控制提供了有效的长期解决方案. 这些先进材料大大减少了污染物迁移,并改善了地下水质量.

科学领域:

环境工程环境工程
地质技术工程地质技术工程
废物管理废物管理

背景情况:

废物管理带来了环境挑战,需要有效的补救技术来治理地下水和土壤污染.
隔离墙和透反应屏障 (PRB) 是已建立的地下水整治方法,但修改后的材料需要进一步研究.

研究的目的:

进行对2%的碳甲基纤维素 (CMC) 修饰本顿石和未修饰的本顿石进行比较分析,用于垂直屏障.
为了评估CMC修饰的土矿在窗和高压喷气接中的现场规模性能.
评估基于天然热带石的PRB的透性和吸附性质,并将其有效性与垂直屏障进行比较.

主要方法:

在窗和高压喷气接中对CMC修饰的本托尼特进行实地调查.
实验室实验测试了以热酸盐为基础的PRB的透性和吸附性.
使用城市固体废物填埋场 (MSWL) 的水文地质数据进行三维数值模拟.

主要成果:

经CMC修改的土石屏障的液压导电率比未经修改的土石低21.9%-50.5%,低至1.02 × 10−8 cm/s.
10年后,污染物流通过CMC修改的本托尼特隔离墙和PRB分别减少到不受保护水平的38.67%和44.97%.
到第10年,PRBs的NH3-N去除率达到52.30%.

结论:

与未经修改的本托尼特相比,CMC修改的本托尼特垂直屏障在降低液压导电性方面表现优越.
经CMC修改的石垂直屏障和PRB的综合系统在缓解MSWL污染物运输方面显示出显著的长期有效性.
这些发现凸显了这些先进的屏障系统在可靠地修复受污染的场所方面的潜力.

关键词:

高压喷气接是高压喷气接.修改后的班托尼特 (bentonite) 是一种修改后的班托尼特.多尺度实验方法多尺度实验方法天然热带石是一种天然的热带石.数字模拟的数字模拟.PRBB PRB 在线播放

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